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Mathematics > Algebraic Geometry

Title:
Horospherical stacks

Abstract: We prove structure theorems for algebraic stacks with a reductive group
action and a dense open substack isomorphic to a horospherical homogeneous
space, and thereby obtain new examples of algebraic stacks which are global
quotient stacks. Our results partially generalize the work of
Fantechi-Mann-Nironi and Geraschenko-Satriano for abstract toric stacks.